Problems in basic functionality

Doesn’t work on Amazon Linux AMI release 2014.03 with php55-5.5.14-1.75.amzn1.x86_64.

Installation process went well, without any issues. The plugin seems to work fine when I’m logged in.

However for anonymous user it shows neither a list of questions (https://www.dropbox.com/s/5mh1c9otfun5et3/Screenshot%202014-07-27%2013.31.38.png?dl=0) nor categories (https://www.dropbox.com/s/k96sw31tyiggbjs/Screenshot%202014-07-27%2013.32.01.png?dl=0)